/**
 * Core script to handle the entire theme and core functions
 */
var Layout = function() {

	var layoutImgPath = 'img/';
	var layoutCssPath = 'css/';

	// * BEGIN:CORE HANDLERS *//
	// this function handles responsive layout on screen size resize or mobile
	// device rotate.

	// Set proper height for sidebar and content. The content and sidebar height
	// must be synced always.
	var handleSidebarAndContentHeight = function() {
		var content = $('.page-content');
		var sidebar = $('.page-sidebar');
		var body = $('body');
		var height;

		if (body.hasClass("page-footer-fixed") === true && body.hasClass("page-sidebar-fixed") === false) {
			var available_height = Metronic.getViewPort().height
				- $('.page-footer').outerHeight()
				- $('.page-header').outerHeight();
			if (content.height() < available_height) {
				content.attr('style', 'min-height:' + available_height + 'px');
			}
		} else {
			if (body.hasClass('page-sidebar-fixed')) {
				height = _calculateFixedSidebarViewportHeight();
				if (body.hasClass('page-footer-fixed') === false) {
					height = height - $('.page-footer').outerHeight();
				}
			} else {
				var headerHeight = $('.page-header').outerHeight();
				var footerHeight = $('.page-footer').outerHeight();

				if (Metronic.getViewPort().width < 992) {
					height = Metronic.getViewPort().height - headerHeight
							- footerHeight;
				} else {
					height = sidebar.outerHeight() + 10;
				}

				if ((height + headerHeight + footerHeight) <= Metronic.getViewPort().height) {
					height = Metronic.getViewPort().height - headerHeight - footerHeight;
				}
			}
			content.attr('style', 'min-height:' + height + 'px');
		}
	};

	// Handle sidebar menu links
	var handleSidebarMenuActiveLink = function(mode, el) {
		var url = location.hash.toLowerCase();

		var menu = $('.page-sidebar-menu');

		if (mode === 'click' || mode === 'set') {
			el = $(el);
		} else if (mode === 'match') {
			menu.find("li > a").each(
			function() {
				var path = $(this).attr("href").toLowerCase();
				// url match condition
				if (path.length > 1 && url.substr(1, path.length - 1) == path.substr(1)) {
					el = $(this);
					return;
				}
			});
		}

		if (!el || el.size() == 0) {
			return;
		}

		if (el.attr('href').toLowerCase() === 'javascript:;' || el.attr('href').toLowerCase() === '#') {
			return;
		}

		var slideSpeed = parseInt(menu.data("slide-speed"));
		var keepExpand = menu.data("keep-expanded");

		// disable active states
		menu.find('li.active').removeClass('active');
		menu.find('li > a > .selected').remove();

		if (menu.hasClass('page-sidebar-menu-hover-submenu') === false) {
			menu.find('li.open').each(function() {
				if ($(this).children('.sub-menu').size() === 0) {
					$(this).removeClass('open');
					$(this).find('> a > .arrow.open').removeClass('open');
				}
			});
		} else {
			menu.find('li.open').removeClass('open');
		}

		el.parents('li').each(function() {
			$(this).addClass('active');
			$(this).find('> a > span.arrow').addClass('open');

			if ($(this).parent('ul.page-sidebar-menu').size() === 1) {
				$(this).find('> a').append('<span class="selected"></span>');
			}

			if ($(this).children('ul.sub-menu').size() === 1) {
				$(this).addClass('open');
			}
		});

		if (mode === 'click') {
			// close the menu on mobile view while laoding a page
			if (Metronic.getViewPort().width < 992 && $('.page-sidebar').hasClass("in")) { 
				$('.page-header .responsive-toggler').click();
			}
		}
	};

	// Handle sidebar menu
	var handleSidebarMenu = function() {
		$('.page-sidebar').on( 'click', 'li > a', function(e) {
			if (Metronic.getViewPort().width >= 992
					&& $(this).parents('.page-sidebar-menu-hover-submenu').size() === 1) { // exit of hover sidebar menu
				return;
			}

			if ($(this).next().hasClass('sub-menu') === false) {
				if (Metronic.getViewPort().width < 992
						&& $('.page-sidebar').hasClass("in")) { // close the menu on mobile view while laoding a page
					$('.page-header .responsive-toggler').click();
				}
				return;
			}

			if ($(this).next().hasClass('sub-menu always-open')) {
				return;
			}

			var parent = $(this).parent().parent();
			var the = $(this);
			var menu = $('.page-sidebar-menu');
			var sub = $(this).next();

			var autoScroll = menu.data("auto-scroll");
			var slideSpeed = parseInt(menu.data("slide-speed"));
			var keepExpand = menu.data("keep-expanded");

			if (keepExpand !== true) {
				parent.children('li.open').children('a').children('.arrow').removeClass('open');
				parent.children('li.open').children('.sub-menu:not(.always-open)').slideUp(slideSpeed);
				parent.children('li.open').removeClass('open');
			}

			var slideOffeset = -200;

			if (sub.is(":visible")) {
				$('.arrow', $(this)).removeClass("open");
				$(this).parent().removeClass("open");
				sub.slideUp(slideSpeed, function() {
					if (autoScroll === true && $('body') .hasClass('page-sidebar-closed') === false) {
						if ($('body').hasClass('page-sidebar-fixed')) {
							menu.slimScroll({'scrollTo' : (the.position()).top});
						} else {
							Metronic.scrollTo(the, slideOffeset);
						}
					}
					handleSidebarAndContentHeight();
				});
			} else {
				$('.arrow', $(this)).addClass("open");
				$(this).parent().addClass("open");
				sub.slideDown(slideSpeed, function() {
					if (autoScroll === true && $('body') .hasClass( 'page-sidebar-closed') === false) {
						if ($('body').hasClass('page-sidebar-fixed')) {
							menu.slimScroll({'scrollTo' : (the.position()).top});
						} else {
							Metronic.scrollTo(the, slideOffeset);
						}
					}
					handleSidebarAndContentHeight();
				});
			}
			e.preventDefault();
		});

		// handle ajax links within sidebar menu
		$('.page-sidebar').on(
			'click', ' li > a.ajaxify',
			function(e) {
				e.preventDefault();
				Metronic.scrollTop();

				var url = $(this).attr("href");
				var menuContainer = $('.page-sidebar ul');
				var pageContent = $('.page-content');
				var pageContentBody = $('.page-content .page-content-body');

				menuContainer.children('li.active').removeClass('active');
				menuContainer.children('arrow.open').removeClass('open');

				$(this).parents('li').each(function() {
					$(this).addClass('active');
					$(this).children('a > span.arrow').addClass('open');
				});
				$(this).parents('li').addClass('active');

				if (Metronic.getViewPort().width < 992
						&& $('.page-sidebar').hasClass("in")) { // close the menu on mobile view while laoding a page
					$('.page-header .responsive-toggler').click();
				}

				Metronic.startPageLoading();

				var the = $(this);

				$.ajax({
					type : "GET",
					cache : false,
					url : url,
					dataType : "html",
					success : function(res) {

						if (the.parents('li.open').size() === 0) {
							$('.page-sidebar-menu > li.open > a').click();
						}

						Metronic.stopPageLoading();
						pageContentBody.html(res);
						Layout.fixContentHeight(); // fix content height
						Metronic.initAjax(); // initialize core stuff
					},
					error : function(xhr, ajaxOptions, thrownError) {
						Metronic.stopPageLoading();
						pageContentBody.html('<h4>无法加载所请求的内容.</h4>');
					}
				});
			});

		// handle ajax link within main content
		$('.page-content').on(
			'click', '.ajaxify',
			function(e) {
				e.preventDefault();
				Metronic.scrollTop();

				var url = $(this).attr("href");
				var pageContent = $('.page-content');
				var pageContentBody = $('.page-content .page-content-body');

				Metronic.startPageLoading();

				if (Metronic.getViewPort().width < 992
						&& $('.page-sidebar').hasClass("in")) { // close the menu on mobile view while laoding a page
					$('.page-header .responsive-toggler').click();
				}

				$.ajax({
					type : "GET",
					cache : false,
					url : url,
					dataType : "html",
					success : function(res) {
						Metronic.stopPageLoading();
						pageContentBody.html(res);
						Layout.fixContentHeight(); // fix content height
						Metronic.initAjax(); // initialize core stuff
					},
					error : function(xhr, ajaxOptions, thrownError) {
						pageContentBody.html('<h4>无法加载所请求的内容.</h4>');
						Metronic.stopPageLoading();
					}
				});
			});
	};

	// Helper function to calculate sidebar height for fixed sidebar layout.
	var _calculateFixedSidebarViewportHeight = function() {
		var sidebarHeight = Metronic.getViewPort().height - $('.page-header').outerHeight();
		if ($('body').hasClass("page-footer-fixed")) {
			sidebarHeight = sidebarHeight - $('.page-footer').outerHeight();
		}
		return sidebarHeight;
	};

	// Handles fixed sidebar
	var handleFixedSidebar = function() {
		var menu = $('.page-sidebar-menu');

		Metronic.destroySlimScroll(menu);

		if ($('.page-sidebar-fixed').size() === 0) {
			handleSidebarAndContentHeight();
			return;
		}

		if (Metronic.getViewPort().width >= 992) {
			menu.attr("data-height", _calculateFixedSidebarViewportHeight());
			Metronic.initSlimScroll(menu);
			handleSidebarAndContentHeight();
		}
	};

	// Handles sidebar toggler to close/hide the sidebar.
	var handleFixedSidebarHoverEffect = function() {
		var body = $('body');
		if (body.hasClass('page-sidebar-fixed')) {
			$('.page-sidebar').on('mouseenter', function() {
				if (body.hasClass('page-sidebar-closed')) {
					$(this).find('.page-sidebar-menu').removeClass('page-sidebar-menu-closed');
				}
			}).on('mouseleave', function() {
				if (body.hasClass('page-sidebar-closed')) {
					$(this).find('.page-sidebar-menu').addClass('page-sidebar-menu-closed');
				}
			});
		}
	};

	// Hanles sidebar toggler
	var handleSidebarToggler = function() {
		var body = $('body');
		if ($.cookie && $.cookie('sidebar_closed') === '1' && Metronic.getViewPort().width >= 992) {
			$('body').addClass('page-sidebar-closed');
			$('.page-sidebar-menu').addClass('page-sidebar-menu-closed');
		}

		// handle sidebar show/hide
		$('body').on('click', '.sidebar-toggler', function(e) {
			var sidebar = $('.page-sidebar');
			var sidebarMenu = $('.page-sidebar-menu');
			$(".sidebar-search", sidebar).removeClass("open");

			if (body.hasClass("page-sidebar-closed")) {
				body.removeClass("page-sidebar-closed");
				sidebarMenu.removeClass("page-sidebar-menu-closed");
				if ($.cookie) {
					$.cookie('sidebar_closed', '0');
				}
			} else {
				body.addClass("page-sidebar-closed");
				sidebarMenu.addClass("page-sidebar-menu-closed");
				if (body.hasClass("page-sidebar-fixed")) {
					sidebarMenu.trigger("mouseleave");
				}
				if ($.cookie) {
					$.cookie('sidebar_closed', '1');
				}
			}
			$(window).trigger('resize');
		});

		handleFixedSidebarHoverEffect();

		// handle the search bar close
		$('.page-sidebar').on('click', '.sidebar-search .remove', function(e) {
			e.preventDefault();
			$('.sidebar-search').removeClass("open");
		});

		// handle the search query submit on enter press
		$('.page-sidebar .sidebar-search').on('keypress', 'input.form-control',
				function(e) {
					if (e.which == 13) {
						$('.sidebar-search').submit();
						return false; // <---- Add this line
					}
				});

		// handle the search submit(for sidebar search and responsive mode of
		// the header search)
		$('.sidebar-search .submit').on('click', function(e) {
			e.preventDefault();
			if ($('body').hasClass("page-sidebar-closed")) {
				if ($('.sidebar-search').hasClass('open') === false) {
					if ($('.page-sidebar-fixed').size() === 1) {
						$('.page-sidebar .sidebar-toggler').click(); // trigger sidebar toggle button
					}
					$('.sidebar-search').addClass("open");
				} else {
					$('.sidebar-search').submit();
				}
			} else {
				$('.sidebar-search').submit();
			}
		});

		// handle close on body click
		if ($('.sidebar-search').size() !== 0) {
			$('.sidebar-search .input-group').on('click', function(e) {
				e.stopPropagation();
			});

			$('body').on('click', function() {
				if ($('.sidebar-search').hasClass('open')) {
					$('.sidebar-search').removeClass("open");
				}
			});
		}
	};

	// Handles the horizontal menu
	var handleHeader = function() {
		// handle search box expand/collapse
		$('.page-header').on(
			'click', '.search-form',
			function(e) {
				$(this).addClass("open");
				$(this).find('.form-control').focus();

				$('.page-header .search-form .form-control').on('blur',
					function(e) {
						$(this).closest('.search-form').removeClass("open");
						$(this).unbind("blur");
					});
			});

		// handle hor menu search form on enter press
		$('.page-header').on('keypress', '.hor-menu .search-form .form-control', function(e) {
				if (e.which == 13) {
					$(this).closest('.search-form').submit();
					return false;
				}
			});

		// handle header search button click
		$('.page-header').on('mousedown', '.search-form.open .submit',
			function(e) {
				e.preventDefault();
				e.stopPropagation();
				$(this).closest('.search-form').submit();
			});
	};

	// Handles Bootstrap Tabs.
	var handleTabs = function() {
		// fix content height on tab click
		$('body').on('shown.bs.tab', 'a[data-toggle="tab"]', function() {
			handleSidebarAndContentHeight();
		});
	};

	// Handles the go to top button at the footer
	var handleGoTop = function() {
		var offset = 300;
		var duration = 500;

		if (navigator.userAgent.match(/iPhone|iPad|iPod/i)) { // ios supported
			$(window).bind("touchend touchcancel touchleave", function(e) {
				if ($(this).scrollTop() > offset) {
					$('.scroll-to-top').fadeIn(duration);
				} else {
					$('.scroll-to-top').fadeOut(duration);
				}
			});
		} else { // general
			$(window).scroll(function() {
				if ($(this).scrollTop() > offset) {
					$('.scroll-to-top').fadeIn(duration);
				} else {
					$('.scroll-to-top').fadeOut(duration);
				}
			});
		}

		$('.scroll-to-top').click(function(e) {
			e.preventDefault();
			$('html, body').animate({
				scrollTop : 0
			}, duration);
			return false;
		});
	};

	// Hanlde 100% height elements(block, portlet, etc)
	var handle100HeightContent = function() {

		var target = $('.full-height-content');
		var height;

		if (!target.hasClass('portlet')) {
			return;
		}

		height = Metronic.getViewPort().height
				- $('.page-header').outerHeight(true)
				- $('.page-footer').outerHeight(true)
				- $('.page-title').outerHeight(true)
				- $('.page-bar').outerHeight(true);

		if ($('body').hasClass('page-header-fixed')) {
			height = height - $('.page-header').outerHeight(true);
		}

		var portletBody = target.find('.portlet-body');

		if (Metronic.getViewPort().width < 992) {
			Metronic.destroySlimScroll(portletBody.find('.full-height-content-body')); // destroy slimscroll
			return;
		}

		if (target.find('.portlet-title')) {
			height = height - target.find('.portlet-title').outerHeight(true);
		}

		height = height - parseInt(portletBody.css("padding-top"));
		height = height - parseInt(portletBody.css("padding-bottom"));

		if (target.hasClass("full-height-content-scrollable")) {
			portletBody.find('.full-height-content-body').css('height', height);
			Metronic.initSlimScroll(portletBody.find('.full-height-content-body'));
		} else {
			portletBody.css('min-height', height);
		}
	};

	// * END:CORE HANDLERS *//

	return {

		// Main init methods to initialize the layout
		// IMPORTANT!!!: Do not modify the core handlers call order.

		initHeader : function() {
			handleHeader(); // handles horizontal menu
		},

		setSidebarMenuActiveLink : function(mode, el) {
			handleSidebarMenuActiveLink(mode, el);
		},

		initSidebar : function() {
			// layout handlers
			handleFixedSidebar(); // handles fixed sidebar menu
			handleSidebarMenu(); // handles main menu
			handleSidebarToggler(); // handles sidebar hide/show

			if (Metronic.isAngularJsApp()) {
				handleSidebarMenuActiveLink('match'); // init sidebar active links
			}

			Metronic.addResizeHandler(handleFixedSidebar); // reinitialize fixed sidebar on window resize
		},

		initContent : function() {
			handle100HeightContent(); // handles 100% height elements(block,
										// portlet, etc)
			handleTabs(); // handle bootstrah tabs

			Metronic.addResizeHandler(handleSidebarAndContentHeight); // recalculate sidebar & content height on window resize
			Metronic.addResizeHandler(handle100HeightContent); // reinitialize content height on window resize
		},

		initFooter : function() {
			handleGoTop(); // handles scroll to top functionality in the footer
		},

		init : function() {
			this.initHeader();
			this.initSidebar();
			this.initContent();
			this.initFooter();
		},

		// public function to fix the sidebar and content height accordingly
		fixContentHeight : function() {
			handleSidebarAndContentHeight();
		},

		initFixedSidebarHoverEffect : function() {
			handleFixedSidebarHoverEffect();
		},

		initFixedSidebar : function() {
			handleFixedSidebar();
		},

		getLayoutImgPath : function() {
			return Metronic.getAssetsPath() + layoutImgPath;
		},

		getLayoutCssPath : function() {
			return Metronic.getAssetsPath() + layoutCssPath;
		}
	};

}();
